First stars VII - Lithium in extremely metal poor dwarfs P. Bonifacio, P. Molaro, T. Sivarani, R. Cayrel, M. Spite, F. Spite, B. Plez, J. Andersen, B. Barbuy, T. C. Beers et al. (5 more) A&A, 462 3 (2007) 851-864 Published online: 21 November 2006 DOI: 10.1051/0004-6361:20064834